已应用以下标题样式
.header {
position: relative;
background-image: url(../img/main-picture.jpeg);
background-size: cover;
background-repeat: no-repeat;
background-position: center;
min-height: 100vh;
position: relative;
border-radius: 20px;
margin-bottom: 77px;
}

在这种情况下,图很简单,我会用它来实现它
radial-gradient: